Percolator



F. J. CROSS Apil 9, 1929.

PERCOLATOR Filed sept.2o, 1927 auf uw mi; lm

l. iNvENToR l relerzcftfoss BY A Cil

Patented Apr. 9, 1929.

Unirse. srarss rairif;Nrorrl'ma..A

FREDERICK d'. CROSS, OF ROCESTER,ONE YORK, ASSTGNOR T0 ROBESON-ROCHSTER CORPORATION, O3? ROCHESTER, 'NEVI YORK, A CORPORATION OIF NEW YORK.

rEncoLAToR.

Application filed september ze, 1927. serial No. 220,778.

This invention relates to the construction of containers of the nature of urns, perco- -lators and the like, and more particularly the construction of thesame from the combination oit parts made of metal and ceramic materials. f

One object ot' the invention'is to provide a container .et this character suchffor example, as a perc'olator, embodying the advantageous features, from sanitary and ornamental aspects of a porcelain body portion With the advantages from the point of 'strength and acilityoit construction of a metallic base portion.v

Another object is to provide such a container having an advantageous viormot construction andl arrangement ot the porcelain and -metalparts adapted to adordan etiicient union and combination ofthe same while eliminatingthe tendencyY tobreakage of the porcelain parts "through different thermal expansion in use. I Y. Y f f `A'it'urther object is to provide a percola'tor of the abovecharacter having a construction which is easy to make and assembleand particularly adapted for combinationwith an electricheating unit.

To these and other ends the invention resides in certain improvements and combinations of parts, all as will be hereinafter more fully described, the novel features being pointed out in theclaims at the end ot the specilication.

ln the drawings: Y

vFig. l is a iront elevation of a percolator embodying my invention. 1

, Fig. 2 is a fragmentary sectionalV view showing the top and base in assembled relation. v, -f Y Fig. 8 is a detail iew oTn the joint between the base and top showing the use ofcement therein. l In the drawings, which show an illustrative enibodiinent oi' my invention, lfdesighates generally a coffee percolator having a Vporcelainbody 2 and-a metal base 3. Suitable legs i may be provided on the base 3 to.`

support the percolator. The base 3 hasa flat portion at'its top uponzwhich the iiat portion 6 of the porcelain bodyrests. On the underside or' the porti'onl is secured the electrical heating unit 7 having an-upsta-nding center'inember 8 projecting through an opening in the center of the portion 5. The mem-v in Fig. e.

preterable itis' obvious that other plastic ma-r ber 8 contains the usual percolating or heat- 'lng well 9 which cooperates with suitable percolator parts, not shown.l Threads l() are formed on the member Sand a clamping nut ll is adapted to be threaded thereon. The nut 1l is i'ormed with a circular flange l2 and a downwardly vo-i'fset center portion 1.3. The

vporcelain body is of suiiicient size to receive the offset center 13 or" the nut l1. Between vthe fiang'e l2 andi the flat part 6 of the body I use a gasket 15 Voi: any suitable material such iiberor hard rubber. This gasket fits closely around the oii'set'center 1S. @n assembling the parts,the joints between the parts, and especially-between the Vclamping nut ll and portions 5 and 6 are covered with a suitable'plastic heat Aresisting sealing material, such` as white lead, indicated at 16 n l/Vhi-le white lead is considered terials or cements may be usedj rThe nut'll is screwed down on the center member 8 until thetlange 1 2 snugly engages the gasket 15. yThe oll'set center 13 ot' nut l1 will then have Yentered Within the opening in the bottom of thefprocelain body. The relation of parts issuch thatfthey do not directly engage'the porceiainlbodyfbut alladjacent surfaces be tweenthebody and-the metal parts are separatedby a iilmlo'l-,plastic cement or sealf 'ing material.

`It will be apparent that I have thus provided al meansior yleldingly clampingl the `body on the base 'ina manner so as to avoid .iange l2 has holes 14 for the insertion of a y 'spanner wrench used in the assembly of the the danger of breakage of the body and at the same time 'maintaining atluid tight joint -between them.

1 he heating unit 7 contains electric resistance elements which arev adapted to'be operated from the `usual house current which enters atthe plug connection v17 provided on the base 3. y y f y It will be seen trom the abovedescription that 4the porcelain and metal partsr of the percolator are .so designed and arranged in A combination-With each other as to presenta relatively large area of contact v:for support and attachment'in which, however, the porcelain Walls ofthe container are spaced from the heat unit to avoid excessive heating and .expansion of the same, and in which there is no direct vcontact of the porcelain and metal parts which are separated by the gasket l5 and the interposed layers ot plastic cement 16, which aiiiord a maxim-uni amount oit relative expansion accompanied, however, by a substantial area oi clamping pressure, so that the body and base i'irn'ily united in a secure and durable manner.

The invention thus affords a vessel having a container portion oi porcelain or other ceramic niaterial with all oft' the advantages of the latter as to sanitation, its resistance to corrosion, ease olf cleaning and general suitability Jor making inely iiavored coffee, with the adaptability et the same for producing ornamental outlines and shapes and suriace patterns, 4colors and finish. At the same time the metallic support or base has a strong torni oif1 construction which lends itself particular y to the satisfactory solution 'of manufacturing problems, particularly in connection with the inclusion of an electric circuit and heating unit, while these porcelain and metal parts are neatly and eiliciently united so that the Whole allords not on-ly a pleasing appearance, but also a durableV and eilicient container.

l claim as my invention:

l. in a percolator, a porcelain body, a metallic base, cooperating surfaces on said body and base, screw thread aeans associated with said base for clamping said surfaces together, and a sealing means including a cement separating said surfaces.

2. In a percolator, a porcelain body, a metal base, cooperating surfaces on said body and base, the cooperating surface on said body having an aperture therein, a heating unit on said base having a portion projecting through the vaperture in said body, clamping means cooperating` with said projecting portion for securing the body on said base, .and a sealing .means including a cement separating the body iroin said base and clamping means.

8. A percolator comprising a` porcelain body having an aperture therein, a metal base, cooperating surfaces on said body and base adjacent said aperture, a heating unit on said base having an upstanding portion projecting through said aperture and spaced from the sides thereof, clamping means cooperating with said upstapding portion 'for securing the bodyon said base, and a sealing means including a cement separating the body Yit'roin said base and clamping means.

1l. A percolator comprising a `porcelain body having an aperture therein, a metal base, cooperatingsurfaces on said body and base adjacent said aperture, heating unit on said base, said unit having an upstanding` threaded portion projecting through said aperture and spaced from the sides thereof, a clamping nut on said tlneaded portion and exerting downward pressure against the interior ot' said body to hold it on said base, and a sealing means including a cement between the nut, body and base.

5. percolator comprising a porcelain body element, a metal base element, each element being provided with registering apertures, a heating unit Within said base, an upstanding threaded portion on said heating unit jinfojecting through said apertures, a nut screwed on said upstanding portion and overlying a portion ot the bottom ot said body, and a cement separating the adjacent surfaces ot said nut, body and base.

(3. A percolator comprising a porcelain body, a metal base, cooperati g liat suitaces on said body and base, the aid su rifare on said body having an aperture centrally thereof, a heating unit on said base positioned centrally olf said coo'ierating sui-'tace thereon, an upstanding threaded portion on said unit projecting through the aperture in said body and spaced from the sides ot said aperture, a nut on said threaded portion adapted to clamp the body and base together, and sealing means including a gasket and a cement tor maintaining the body out of direct contact with said nut and With said base.

7; A percolator comprising a porcelain `body element, a metal base element, each element being provided with registering apertures, a heating unit Within said base, an upstanding threaded portion on'said heating unit projecting through said apertures, and a flanged nut having a downwardly ollset center adapted to be screwed on said upstanding portion, the aperture rin the porcelain body element being suliiciently large to surround said downwardly offset center and to lie bneath the flanged portion ol said nut.

8. A percolator comprising' a porcelain body having i'iat lower sui-tace with an aperture therein, a metal base having an upper Yflat surface `with an aperture therein of smaller size than said lirst mentioned aperture, a heating unit secured within said base, an upstanding threaded.portion on said unit, said threaded portion being adapted to lit the apertur in said base, and a nut threaded on said threaded portion, said nut comprising a flange and a downwardly otl'set center portion, said center portion being of a size to lit vithin the aperture in said body.

Q. A percolator comprising a porcelain body having a flat lower surface with an aperture therein, ra metal base having an upper ilat surtacevivith an aperture therein ot' smaller size than said first mentioned aperture, a heating unit secured Within said base, an opstanding tiireaded portion on said unit, said threaded portion being adapted to tit the aperture in said base, and a nut threaded on said threaded portion, said nut comprising a liange and a downwardly oilset center porlUO tion, said center portion being ot a size to lit within the aperture in saidbody, and a gasket between said flange and said body. Y

10. A percolator `comprising ay porcelain body having a flat lower surface with an aperture therein, a metal base klia-.ying an upper flat surface with an aperture therein of sinaller size than said first mentioned aperture, a heating unit secured within said base, an upstanding,- threaded portion on said unit, said threaded portion being adapted to t the aperture in said base, and a nut threaded on said threaded portion, saidr nut Comprising a flange and a downwardly offset Center portion, said center portion being ot a size to lit within the aperture in saidv body, the joints between said nut, body and base being sealed by a cement.

l1. A percolator comprising,` a body portion, a yiat annular bottom on said body p0rtion having an aperture therein, an annular f base, a flat top on said base having an aperture therein, a heating element secured to the underside of said base, an upstanding center portion on said heating element eX- tending through the apertures in said base and body, a nut threaded on said upstanding portion, a downwardly offset ,center on said nut litting within the aperture in the body, and a flange on said nut overlying a portion of the bottoni o1 said body.

12. A percolator comprising a body portion, a flat annular bottoni on said body portion having an aperture therein, an annular base, a llat top on said base having an aperture therein, a heating element secured to the underside of said. base, an upstanding- Center portion on said heating elenlent extending through .the apertures in said base and body, a nut threaded on said upstanding portion. a downwardly oli'set Center on said nut itting Y within the aperture in the body, and a flange on said-nut overlying a portion ot the bottom ot said body, and a cement separating` the ad- `meent surfaces of said nut, base and body.

FREDERICK J. CROSS. 

